Air-pressure conveyer



March 10, 1931. H. PEIK.ERT

AIR PRESSURE CONVEYER Filed May 24, 1928 Patented Mar. it), 1931 IEIEIIZIN'BIIIGE MILK" OE KALKBERGE, emmmr Application filed Kay 24, 1923, erial No. 280,288, and in Germany June 4, 198?.

This invention relates to air-pressure conveyers, and more. especially to conveyors of this kind which serve for the conveyance of bin or the like, and a compartment-wheel provided below said container or bin. In airpressure conveyors of this kind the material 1 to be conveyed is immediately carried into a stream of pressure-air by means of said compartment-wheel, the pressure-air forcing said material into the discharge conduit proper. Experience with pressure-air conveyers of this kind has shown that as soon as a certain counter-pressure is generated due to the motion of the material in the conveying conduit, there will arise the danger that a part of the pressure-air enters through the ;compartment-wheel back into the bin or container. This will have the efiect that the material contained therein will be stirred up and uselessly discharged which will cause much annoyance to the persons operating the conveyer and proper filling of the compartment will be it or impossible to'etlect.

In addition to this, the mechanical eficiency of the device will be greatly reduced by this backward motion of the pressure-air. By my invention these disadvantages are fully avoided, Myinvention consists essentially therein that a suitable pipe-conduit is inserted intermediate the conveying conduit and the bin, this pipe-conduit shooting a compensation of the pressures arising in the pressure conduits. It therefore for instance,

a pressure of L8 atmospheres prevails inthe conveying conduit by inserting the said pipeconduit. the sheet will be obtained that even pressure prevails in the binor container. In this case however, it is essential that the pipe-conduit which is used for bringing about this compensation of pressure is hranched ed the pressure-air supply-conduit immediateiy past-er on the downstrem side oi the nozzle and not from the conveying or discharging pipe-conduit.

In the accompanying drawing I have represented an example of a conveyer constructed according to my invention. Fig. 1 is a vertical section through the air-pressure operated conveyer according to my invention and Fig. 2 is a partial cross-sect1on through the under part of said conveyer, said cross section showing the feed wheel therein, and Figure 3 is an enlarged sectional view of a portion of the arrangement shown in Figure 1 illustrating the preferred relative disposition of the nozzle and the compensating pipe-conduit. In the drawing, a is the bin or container to which the pulverized material to be treated is supplied by means of the pipe-stud Z, whlch is provided with a flap, valve or the like we serving to close up said pipe-stud. The bin or container a merges below into a conical part b, a com artment wheel at or the like serving to supp y-proper portions of the material through the ap paratus. The compartment-wheel d is rigidly mounted on a shaft 0 which may be driven by means of the pulley f. Underneath the compartment-wheel 03 there is provided a hollow chamber into which the material to be conveyed by the conveyer is emptied by means of said compartment-wheel. Pressureair is introduced into said hollow chamber byway of the pressure-air conduit 9, while the material after being conveyed through the conveyer may be discharged therefrom by means of the discharge conduit has indicated by the arrows in the drawing. inserted into the pressure-air supply-conduit g is a perforated member or nozzle and the pipeconduit is which serves for bringing about the compensation of pressure is branched oil the pressure-air supplyconduit g adjacent the delivery end of said nozzle 2'. The opposite end of the pipe-conduit is is connected with the bin or container as may be seen "from the drawing.

I claim: An air pressure operated conveyer for pulverized material, comprisin a bin adapted to receive the material and having a dis- 5 charge opening therein, a compartment wheel associated with said discharge openin a chamber beneath said compartment w eel into which the material is discharged by said wheel, said chamber having adischarge openm ing therein, a conduit for deliverin air under pressure to said chamber, a nozz e in said conduit, and a pipe connection between said bin and a point in said conduit adjacent said nozzle and on the delivery side of said nozzle. 35 In testimony whereof I afiix my signaturer mmnmn rnmmt 

